/// MKV 묶음 · 다운로드 시험의 대역 (batch_test · batch_ui_test 가 같이 쓴다): 멈춰 두는 FFmpeg · 음성인식 · 번역 · 다운로드 엔진
library;

import 'dart:async';
import 'dart:io';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/core/download_detect.dart';
import 'package:jj_mkvmaker/core/models.dart';
import 'package:jj_mkvmaker/core/srt.dart';
import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
import 'package:jj_mkvmaker/services/ai_services.dart';
import 'package:jj_mkvmaker/services/downloader.dart';
import 'package:jj_mkvmaker/services/media_tool.dart';
import 'package:jj_mkvmaker/services/platform_services.dart';
import 'package:path/path.dart' as p;

class TestRecognizer implements SpeechRecognizer {
  @override
  void cancel() {}
  final heard = <String>[];
  @override
  Future<List<Cue>> transcribe(String wavPath,
      {required String modelPath, String language = 'auto', AiProgress? onProgress}) async {
    heard.add(p.basename(wavPath));
    return [Cue(const Duration(seconds: 1), const Duration(seconds: 2), 'Hello everyone, this is a test.')];
  }
}

/// 240: 취소될 때까지 끝나지 않는 FFmpeg (여럿이 동시에 도는 상태를 만든다)
class HoldTool implements MediaTool {
  final runs = <Object?, Completer<void>>{};
  @override
  Future<String?> version() async => 'ffmpeg test';
  @override
  Future<Set<String>> encoders() async => {'libx264'};
  @override
  Future<MediaInfo> probe(String path) async => const MediaInfo(duration: Duration(seconds: 1));
  @override
  Future<void> runFfmpeg(List<String> args, {Duration? duration, ProgressCallback? onProgress, Object? tag}) async {
    final c = runs[tag] = Completer<void>();
    try {
      await c.future;
    } finally {
      runs.remove(tag);
    }
  }

  void _stop(Completer<void>? c) {
    if (c != null && !c.isCompleted) c.completeError(MediaToolException('사용자가 취소했습니다.'));
  }

  @override
  void cancel() => runs.values.toList().forEach(_stop);
  @override
  void cancelTagged(Object tag) => _stop(runs[tag]);
}

class TestTranslator implements Translator {
  @override
  Future<void> load(String modelDir) async {}
  @override
  Future<List<String>> translate(List<String> lines,
          {required String source, required String target, AiProgress? onProgress}) async =>
      [for (final l in lines) '[$target] $l'];
  @override
  void cancel() {}
  @override
  Future<void> dispose() async {}
}

class TestDownloadBackend implements DownloadBackend {
  @override
  DownloadKind get kind => DownloadKind.video;
  @override
  Future<(String, List<PlaylistEntry>)?> expandPlaylist(String url) async => null;
  @override
  Future<void> start(DownloadTask t, void Function() changed) async => t.state = DownloadState.downloading;
  @override
  Future<void> pause(DownloadTask t) async {}
  @override
  Future<void> cancel(DownloadTask t) async {}
  @override
  Future<void> shutdown() async {}
}

/// 262: [HoldTool] 과 같지만, 끝내면 (결과 이름으로 바꿀) 임시 출력 파일을 쓴다
class EndTool extends HoldTool {
  final args = <Object?, List<String>>{};
  @override
  Future<void> runFfmpeg(List<String> a, {Duration? duration, ProgressCallback? onProgress, Object? tag}) async {
    args[tag] = a;
    await super.runFfmpeg(a, duration: duration, onProgress: onProgress, tag: tag);
    File(a.last).writeAsStringSync('NEW');
  }

  /// [tag] 의 FFmpeg 를 성공으로 끝낸다
  void finish(Object tag) => runs[tag]!.complete();
}

AppController plainController() =>
    AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));